Machine for spinning cotton and other textile materials



Nov. 20, 1928.

A. TURATI MACHINE FOR SPINNING COTTON AND OTHER TEXTILE MATERIALS Filed Oct. 10,1927

. aperture in the roving guide it often Fate'nted Nov. 20, 1928.

UNITED sm'rss it g 1,692,357

AMBBOGIO 'IEITEATL OF TURIN, ITALY.

MACHINE FOR. SPINNING COTTON AND OTHER TEXTiLE MATERIALS.

Application filed October 10, 192?, Serial No 225,245, and in Italy December'18, 1926.

In continuous ring spinning machines there" is found this grave inconvenience When the roving is threaded through tl e hat after having passed under the pair of ear cylinders it is not seized by the pair of ntermediate cylinders on account of the deviations of its extremity, it winds itself upon the rear grooved cylinder or upon the lower cleaner (when one is used).

To prevent this inconvenience the worker has to assist underneath with her fingers, the introduction of the roving between the pairs of cylinders (and that is only pcssible' when there is no cleaner) or to raise the back pressure cylinder in order to be able to assist upwardly with her fingersv the introduction of the roving.

By acting in this manner the following in conveniences are caused:

1. Loss of time of the worker who is pre vented from paying'better attenticn to her work which results in a larger amount of loss and waste.

2. T he worker can easily break the threads with her arm when seeking to assist the introduction of the roving from below.

' 3. The size and twist of the thread is irregular when the worker raises the burl: pressure cylinder for the drawing of? between the second and third pairs of cylinders being suppressed, the other thread which passes between these pairs (ifnot broken as occurs very often) becomes for thelength of a iew 'ineters, thicker and in consequence more twisted. I

If this thread breaks there is the inconvenience of having to attach two threads instead of one. This defect is still more noticeable if the amount drawn off between the pairs of back cylinders is considerable as is the case in modern spinning machines.

Moreover when the roving winds itself up considerably on the back grooved cylinder, there are irregularities in the size and twist of the thread because the pressure cylinder being unable to press properly on the lower grooved cylinder, the attached roving enters. without being drawn off, between the pair of front cylinders; in addition sometimes the roving also becomes entangled in the little supports of the grooved cylinders which under the effort vibrate causing serious damage, especially when working fine or loosely twisted yarns.

The apparatus, forming the object of the happens present invention prevents all theseinconveniences because by its employment, therovthreaded through the hole of the roving guide, after it has passed, without any need of being assisted by theworker, under the back cylinder, is always seized by the intermediate cylinders.

Such an apparatus consists substantially in a bridgeipiece suspendedby side arms from the pivots of theback pressure cylinder the central portion of which bridge extends between the-two rear and intermediate grooved cylinders to support and guide the roving.

In the accompanying drawing is represented, by way of example, a form of construction of the apparatus forming the obect of the present invention.

Fig. 1 shows in perspective this apparatus and the back pressure cylinder from thepivots of which it issuspended.

F 2 shows a transverse section of the apparatus applied to the spinner.

lindicates the rear pressure cylmder from "he pivots of which is suspended the appa- The surface 2 of the apparatus is provided at both sides at its central part with projections or teeth Q -and 2 pressing-against the central smooth part of the grooved cylinders 4E and5, which prevents the edges of the sur-' face 2 from running against the grooves of paratus in its exact position for working. Claims I v 1. In a ring spinning machine, the combination. with a rear pressure cylinder, and rear and intermediate grooved cylinders, of a bridge piece suspended from the pivots of the pressure cylinder and extending between the rear and intermediate cylinders substantially tangential to said cylinders and adapted to support and guide the roving in its passage between the pair of rear cylinders and the pair of intermediate cylinders.

2. In a continuous ring spl the said cylinders whilst they hold the ap- I nning machine,

the combination with the rear pressure cylinder and the rear and intermediate grooved cylinders, of a bridge piece extending between the rear and intermediate cylinders and forming a supporting and guiding surface for the roving substantially tangential to said cylinders, said bridge piece having projections cooperating With the rear and intermediate grooved cylinders to hold the edges oil the bridge piece in operative relation to the cylinders.

3. In a continuous ring spinning machine, the combination With the rear pressure cylinder and the rear and intermediate grooved cylinders, of a bridgepiece comprising a central portion forming a guide for the roving and having lateral arms connected to the axle of the pressure cylinder to support the central portion substantially to entiai to thecylindcrs, said central. portion having projections on opposite edges engaging central sn'iooth portions of the grooved cylinders whereby the bridge piece is maintained in onerative relation to the cylinders.

In testimony that I claim the foregoing as my invention, l have signed my name.

AMBROGIO TURATI. 

